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Finding the Fourth Proportional to 12,720.69, 17,543.07 and 7,941.08

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Solution

The fourth proportional to 12,720.69, 17,543.07 and 7,941.08 is: 10,951.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,720.69 : 17,543.07 = 7,941.08 : x
  2. Step 2: Convert to fraction form
    12,720.69/17,543.07 = 7,941.08/x
  3. Step 3: Cross multiply
    12,720.69x = 17,543.07 × 7,941.08
  4. Step 4: Simplify right side
    12,720.69x = 139,310,878.66
  5. Step 5: Solve for x
    x = 139,310,878.66/12,720.69
  6. Step 6: Final answer
    x = 10,951.52

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.